This study was carried out at The Experimental Station of Agricultural Botany Department, Faculty of
Agriculture, Benha university, Qlubia governorate, Egypt during 2015 and 2016 seasons to evaluate the effect of
foliar application with benzyl adenine (BA) at 100 mg/L, Paclobutrazol (PP333) at 20 mg/L, algae extract at 20
ml/L, some mineral nutrients (i.e., Ca,Mg and Fe) at 500 mg/L and lithovit at 500 mg/L on leaflets and stems
histological features of Moringa olifera plants at 90 and 180 days after sowing. Results revealed that different
anatomical characteristics of moringa leaflets and stems were positively responded in the two stages of growth.
Also, the obtained data showed that: the most traits of moringa leaflet anatomical features were increased with
different applied treatments. In this respect, Paclobutrazol (PP333) at 20 mg/L, algae extract at 20 ml/L and
lithovit at 500 mg/L were the most pronounced treatments. Of these anatomical features were thickness of
leaflet midvein, length & width of midvein vascular bundle, phloem & xylem tissues thickness, number of
xylem vessels in midvein vascular bundle as well as the leaflet lamina thickness for leaflet. The cuticle
thickness, epidermis thickness, cortex thickness, thickness of phloem tissue, thickness of cambial region, xylem
tissue thickness, number of xylem vessels /xylem row, number of xylem rows /vascular cylinder and diameter of
the xylem vessel in the stem. Generally, Paclobutrazol (PP333) at 20 mg/L and algae extract at 20 ml/L appeared
to be the most effective treatments on increasing counts and measurements of the studied histological features of
Moringa oleifera leaflets and stems either at 90 or 180 days after sowing.